From document to accounting effect

The relationship to maintain is assets = liabilities + equity. It checks arithmetic consistency after recording, but does not prove that an account was chosen correctly. A shelving purchase posted as an expense could still yield a balanced entry. Before touching the number, ask whether the event occurred and what evidence establishes it. Then identify the two or more accounts affected. A bank statement establishes the cash movement. The supplier invoice tells us what the shop bought. Neither document by itself gives the complete analysis.

Double-entry recording puts equal amounts on debit and credit sides. Debit and credit are names for the sides of an account; neither means good, bad, cash in, or cash out. Assets and expenses normally increase on the debit side. Liabilities, equity, and revenue normally increase on the credit side. Paying for a durable resource increases equipment on the debit side and reduces cash on the credit side. Completing a service and receiving payment increases cash on the debit side and revenue on the credit side. Recording only the bank receipt and seeing a correct bank balance does not establish that the journal is complete.

Work through the three events. The owner's transfer instruction and bank deposit support a debit to cash of 60,000 and a credit to owner capital of 60,000. Assets now equal 60,000, liabilities zero, and equity 60,000. The shelving invoice and payment support a debit to store equipment of 9,000 and a credit to cash of 9,000. Assets become cash of 51,000 plus equipment of 9,000, still 60,000 in total. Under the case assumption that the shelves serve later periods, purchase is not itself the current period's entire expense. Subsequent cost allocation needs a useful-life estimate and an applicable policy; do not invent depreciation at this point. The service invoice, evidence of completed work, and receipt support a debit to cash of 1,500 and a credit to service revenue of 1,500. Closing cash is 52,500; add equipment of 9,000 for total assets of 61,500. The other side is opening owner capital of 60,000 plus the 1,500 service result. The case gives no liability.

Check the answer in three layers. Each entry has equal debits and credits. The combined entries preserve the accounting equation. Most importantly, the account meaning fits the evidence. If the 9,000 payment were one month's rent rather than shelving, the debit would be rent expense even though the entry would still balance. If a shelving invoice arrives before receipt or transfer of control is evidenced, do not record an acquisition merely because paper arrived; examine the transaction terms with the authorised reviewer. If the invoice bundles shelving, installation, or tax, separate the components according to the applicable accounting policy instead of guessing from the grand total. A specialist documents the uncertainty and escalates judgments beyond delegated authority.

A second worked application: the shop receives consumable supplies costing 800 on credit, together with an invoice due in two weeks. Assume the example's policy records supplies as an asset on receipt and as expense when consumed. At receipt, debit supplies 800 and credit accounts payable 800. Cash does not move; assets and liabilities each rise by 800. At later payment, debit accounts payable 800 and credit cash 800. There is no second purchase cost. If an issue record later shows 300 of supplies used, debit supplies expense 300 and credit supplies 300. Separating receipt, settlement, and consumption prevents a single premature expense from concealing their different dates.

One more review exercise: a colleague posted the first case as “debit shelving expense 9,000, credit cash 9,000.” The entry balances, but its classification conflicts with the stated multi-period use. Obtain the invoice, asset description, capitalization policy, and approval threshold. If the policy applies, propose reclassifying the amount from expense to equipment and explain the increase in this period's profit and assets. If the approved policy or materiality leads to another treatment, do not silently change the ledger. Present the alternatives and their reasons to the authorised decision-maker. Arithmetic agreement and sound classification are separate tests.